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Old 07-21-2025, 11:58 AM   #18
51shoeboxer
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Join Date: Sep 2024
Location: California
Posts: 81
Default Re: 49 8BA has no power

Quote:
Originally Posted by Vanspeed View Post
Yes the engine has the correct carb on it, the owner sent Charlie an earlier version as he was not aware that the 94 changed at all. I also suspect that the mechanical advance might be seized. I am checking that on Monday.
The Holley 94 carburetor is part of the load-a-matic advance system. There is no mechanical advance system (centrifugal advance); only a vacuum advance system in which engine vacuum is used to advance ignition timing. It is possible that the vacuum-controlled advance plate in the distributor is stuck, but you can easily check that. Another possibility is that the vacuum diaphragm on the distributor has failed. If you have an adjustable timing light, you might measure ignition timing at idle and with the engine at about 2000 RPM. With the load-a-matic system functioning properly, you should see the ignition timing advanced about 20 degrees at 2000 RPM. Good luck.
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